Kentucky has an official plate, issued by the Department of Motor Vehicles. The cost is very low, only $25 for a five year plate (plus your required road tax). The Grand Lodge gets a $7 rebate on every tag sold.
Interestingly, Georgia has a Shriner plate, but no Blue Lodge plate, yet. (Georgia should have one soon). (Georgia Prince Hall Masonry, has a plate approved, but there is no sample plate visible on the Georgia DMB website)
I was in Florida in 2010. I met a retired man, who worked for the Florida Dept of Motor Vehicles. He said that Florida was close to getting an official plate, but there were some hurdles to clear.
Arkansas has an official Masonic plate, but the Grand Master has forbidden any Arkansas Mason from purchasing the plate.
Alabama has a Shriner plate, but no Craft Lodge plate at this time. I spoke with the Grand Master, back in 2009, and he indicated that there were not enough Masons in Alabama, who would agree to pre-order a tag, for the DMV to go into production.
I would like to see all 50 states, as well as DC and the territories get an official Masonic plate. If your state does not yet have one, you should contact your state representative and/or Dept of motor vehicles and demand that your state get one.